How to Replace the Key Battery for BMW X3?

1 Answers
McConnor
07/30/25 12:09am
BMW X3 key battery replacement tutorial is as follows: 1. There is a small switch in the upper middle part of the back of the key. Gently press it to remove the mechanical key. 2. Use the mechanical key to open the key cover by inserting it into the notch next to the key and gently prying it open. 3. Remove the key compartment cover to reveal the position of the old battery. 4. A small flat-head screwdriver can be used to remove the old battery more easily. 5. When installing the new battery, ensure the positive side is facing up. 6. Reassemble the key cover and mechanical key. 7. Test the key functions, such as the lock button, to ensure they are working properly.
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